US3564869A - Multiple-system double-cylinder circular knitting machine for knitting links-and-links patterns - Google Patents

Multiple-system double-cylinder circular knitting machine for knitting links-and-links patterns Download PDF

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Publication number
US3564869A
US3564869A US747232A US3564869DA US3564869A US 3564869 A US3564869 A US 3564869A US 747232 A US747232 A US 747232A US 3564869D A US3564869D A US 3564869DA US 3564869 A US3564869 A US 3564869A
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coupling
knitting
cylinder
sliders
cam
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Expired - Lifetime
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US747232A
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English (en)
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Ernst-Dieter Plath
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Mayer and Cie GmbH and Co
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Mayer and Cie GmbH and Co
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/06—Circular knitting machines with independently-movable needles with needle cylinder and dial for ribbed goods

Definitions

  • FIG. 2e F/GZd F/GZc F/GZb v H6. 20
  • a multiple-system double-cylinder circular knitting machine having upper and lower cylinders each provided with a cam assembly and a needle assembly one of which rotates with respect to the other for acting on a circumferential row of double-ended latch needles in a given direction.
  • the upper and lower cylinders respectively have coupling sliders coacting with the needles for transferring them between the upper and lower cylinders, while the lower cylinder has pattern jacks and intermediate jacks coacting with the pattern jacks for controlling the coupling sliders of the lower cylinder.
  • each of the cylinders is divided into a series of independent knitting systems, and each knitting system of the lower cylinder is provided with a collecting station where all of the coupling sliders are collected, and a selecting station where a selection is made of those pattern jacks which will influence the intermediate jacks to bring about movement of selected coupling sliders of the lower cylinder.
  • the selecting station of each knitting system is situated, as seen in the direction in which the row of needles are acted upon, in advance of the collecting station of each knitting system.
  • the invention relates to multiple-system double-cylinder circular knitting machines for knitting links-and-links patterns.
  • the operating speed of the machine is maintained within relatively narrow limits because of the required transfer of needles ,between upper and lower cylinders of these machines, in either direction between these cylinders. This limitation on the operating speed assures proper operation of coupling sliders during needle transfer operations.
  • a primary object of the invention to provide a double-cylinder circular knitting machine of the above general type which can operate very reliably to achieve patterned knitted goods at a rate of output which is substantially higher than has heretofore been possible.
  • each knitting system in the lower cylinder a selecting station where, in accordance with a predetermined pattern, selected jacks will bring about control of the sliders to achieve a selected transfer of the needles between the upper and lower cylinders, and each knitting system in the lower cylinder has a collecting station for all of the cou pling sliders.
  • the selecting station of each knitting system in the lower cylinder as considered in the circumferential direction in which the needles are acted upon, is situated in advance of the collecting station of each knitting system.
  • This arrangement of the selecting station in advance of the collecting station in each knitting system brings about a very substantial reduction in the circumferential width required for each knitting system, so that around the circumference of a given machine it is possible to arrange a substantially greater number of knitting systems than was heretofore possible.
  • the result is that during each revolu tion of the machine a larger number of courses are knitted than has heretofore been possible with conventional machines.
  • the control of the coupling sliders for the double-ended latch needles in the lower cylinder is brought about in accordance with the invention at the selecting and collecting stations of each knitting system by way of the butts which are guided along predetermined cam paths.
  • the coupling sliders of the lower cylinder are acted upon by intermediate jacks whose butts are directed along special cam paths, and these intermediate jacks are in turn controlled by the selections made at the selection stations through pattern jacks.
  • the selecting arrangement of the invention brings about a selective positioning of the individual needles from one knitting system to the next, so that there is a practically unlimited pattern possibility.
  • the coupling sliders of the lower cylinder after a needle has been transferred therefrom to the upper cylinder, remain, after uncoupling, in their outwardly swung uncoupling positions, so that until the next-following collecting station is reached there is no noticeable and time-consuming longitudinal shifting which must be carried out and which would result in an unnecessary wearing away of the sliders and above all in an undesirable increase in the required width for each knitting system, since the longitudinal shifting of the sliders must be accompanied not by cam paths of any desired steepness but rather by relatively flat cam paths which thus require a considerably circumferential dimension.
  • the upper and lower cam assemblies are respectively provided with coupling slider retaining means with each of these retaining means extending circumferentially along the entire width of an individual knitting system and including an elongated rib projection situated in a groove of a wall of the cam assembly wherein the retaining means is yieldable and resiliently supported for limited radial movement while being prevented from axial movement.
  • each coupling slider of the invention is formed with an elongated notch at its side which is directed toward the retaining means, and the length of this notch is at least as great as the width of the guide surface and is arranged in such a way that a swinging of a coupling slider in the region of a depression of the retaining means takes place, in spite of the presence of the guide surface, in the case where the cam structure provides a predetermined coupling path of movement for the coupling sliders.
  • the guide surfaces of the retaining means act to prevent tilting of the coupling sliders, an operation which is of the utmost importance in connection with the swinging of the latches of the needles during axial movement of the latter with respect to the tips of the coupling sliders.
  • each retaining means preferably enables the latter to be situated in a groove of the wall which carries the cams of the cam assembly so as to reliably prevent axial displacement of the retaining means, while each retaining means is provided at its central region, between its opposed ends, with an axially extending stop member which is normally acted upon by a pair of springs symmetrically situated with respect to the stop member between the retaining means and the base of the groove in which the latter is guided.
  • These springs form a spring means urging the stop member into engagement with the rear surface of a cam plate which affords a limited extent of radial shifting of the retaining means.
  • FIG. 1 is a schematic developed illustration of the cam assemblies for the upper and lower cylinders of a double- 4 cylinder circular knitting machine of the invention, with these cam assemblies shown distributed over three independent knitting systems;
  • FIGS. 2a-2e are respectively schematic sectional elevations taken along lines 2a2a up to 2e2e of FIG. 1;
  • FIG. 3 is a schematic developed illustration showing the structure of FIG. 1 with different controls achieved by way of an unillustrated pattern selecting device;
  • FIGS. 4a-4e are respectively fragmentary longitudinal sectional elevations taken from section lines 4a4a up to 4e-4e of FIG. 3 in the direction of the arrows;
  • FIG. 5 is a fragmentary front elevation of a pair of retaining means for the knitting systems of the lower and upper cylinders;
  • FIGS. 6a-6c are respectively fragmentary longitudinal sections taken along lines 6a--6a, 6b-6b and 6c6c of FIG. 5 in the direction of the arrows;
  • FIG. 7 is a schematic sectional plan view taken along line 77 of FIG. 5 in the direction of the arrows and showing further details of the retaining means;
  • FIGS. 8a8c respectively correspond to FIGS. 6a-6c but illustrate how the coupling sliders are acted upon when they are not directed along a predetermined coupling cam path.
  • Double-cylinder circular knitting machines have, as is well known, double-ended latch needles which are selectively capable of operating either in the lower or in the upper cylinder.
  • double-ended latch needles which are selectively capable of operating either in the lower or in the upper cylinder.
  • the coupling is brought about by swinging of a coupling slider, constructed so as to carry out a limited tilting movement, in a slider guide path of the cylinder during simultaneous longitudinal shifting of the needle, so that the double-ended latch needles will be selectively engaged and released at its opposed ends.
  • FIGS. 1 and 3 the cam assembly of the upper cylinder O and the cam assembly of the lower cylinder U are illustrated in a developed view which is for the most part schematic and which is shown as including three independent knitting systems I, II, III following one another. It is to be understood that a series of such independent systems are circumferentially distributed about the common axis of the upper and lower cylinders.
  • FIGS. 2 and 4 show sections taken axial through the knitting system II, these sectional views of FIGS. 2 and 4 illustrating the slider and needle positions during operations which take place at this knitting system with different controls brought about by the selecting device.
  • the individual machine components are indi cated by Arabic numerals.
  • FIGS. 2a-2e and 4a-4e there are arranged in the guide slots of the lower cylinder, one after the other from the bottom toward the top, pattern jacks 10, intermediate jacks 11, and coupling sliders 12 for the double-ended latch needles 13 with these components 10, 11, 12 being longitudinally or axially shiftable; coupling sliders 12 are also capable of a limited swinging movement toward and away from the axis of the cylinder.
  • the upper cylinder 0 there are slots for axially or longitudinally guiding the coupling sliders 14 which are precisely aligned with the coupling sliders 12 over the lower cylinder.
  • the intermediate jacks 11 and the coupling sliders 12 and 14 respectively have butts 110, and which extend into predetermined cam paths of the knitting systems I-III, as is apparent from FIGS. 1 and 3.
  • the butts advance through the knitting systems I-III in the direction of the arrow 15, so it is in this circumferential direction that the successive needles are acted upon.
  • the pattern jacks are provided with upper butts 100, shown in FIGS. 2a and 2b, and an unillustrated lower butt is also provided for each pattern jack 10. This lower butt of each pattern jack 10 will or will not coact with a control cam 16 in the lower cylinder U (FIGS. 1 and 3) depending upon the particular pattern selection.
  • the pattern selection is carried out by way of a known Jacquard selecting apparatus, with a selecting structure being provided for each knitting system.
  • the Jacquard apparatus includes pin drums which in a known way act at the selecting stations 17, illustrated in the form of elongated dotted slots in FIGS. 1 and 3, on the unillustrated lower control butts of the pattern jacks 10.
  • each cam assembly for each system includes in the lower cylinder, in addition to the control cam 16, cams defining the lower cam path 18 and upper cam path 19 for the butts 110 of the intermediate jacks 11 as well as cams defining the lower path and the upper path 21 for the butts 120 of the coupling sliders 12 of the lower cylinder.
  • cams defining the lower cam path 18 and upper cam path 19 for the butts 110 of the intermediate jacks 11 as well as cams defining the lower path and the upper path 21 for the butts 120 of the coupling sliders 12 of the lower cylinder.
  • the butts 140 of the upper coupling sliders 14 are guided along identical unchanging paths in each knitting system of the upper cylinder, this path being the single cam path 28 providing for movement of the coupling sliders between the loop-sinking stations 29 and the coupling regions 30.
  • each individual knitting system In circumferential alignment with the selecting locations 17 of the pattern selecting device, there is at each individual knitting system a selecting station A which is situated, considered in the direction in which the circumferential row of needles are acted upon, in advance of the cam paths 19 and 21 for the butts 110 and 120, respectively, of the intermediate jacks 11 and the coupling sliders 12, respectively, the selecting station A being situated in each of the systems I-III in advance of the location where the paths 19 and 21 branch from the lower paths 1 8 and 20, respectively.
  • the upper cam path 21 for the butts 120 of the coupling sliders 12 leads to a location where it becomes connected with and communicates with an upper coupling path 22 which extends beneath a collecting station S, so that all of the coupling sliders 12 in the paths 21 and 22 come together to an intermediate position at the collecting station S, to thus bring all of the needles into a position for return from the upper cylinder into the lower cylinder.
  • An important feature of the invention is thus the arrangement in each knitting system of the selecting station A in advance of the collecting station S seen in the circumferential direction in which the row of needles is acted upon.
  • the selection of the needle is already made at the lower cylinder before the needles are brought together at the collecting station, where in accordance with the previously made selection the needles can immediately be directed in the desired number back to the upper cylinder, so that they can knit loops at the upper cylinder in the same knitting system Where the selection is made.
  • cam II/ 16 meanscam 16 in system II.
  • FIGS. 2a-2e and 4a4e respectively illustrate axial sections of the knitting system 11 with different controls for needles according to different pattern selections.
  • FIGS. 2a-2e the path of movement of the sliders and needles is illustrated in the case where at the selecting station 17 of the knitting system II the pattern device brings about transfer to the upper cylinder of all needles which carried out knitting operations in the lower cylinder U in the immediately preceding system I.
  • the control cam II/ 16 coacts with the lower unillustrated butt of the pattern jack 10 to raise the latter against an intermediate jack 11 and thus bring about location of the butt in the upper cam path II/ 19.
  • the intermediate jack 11 then will press against the coupling slider 12 arranged thereover, to which a needle 13 is coupled, and the butt of this coupling slider 12 is thus compelled to move upwardly along the cam path II/21 which leads to the collecting station II/S.
  • the pattern jack 10 has its butt 100 controlled by the cam edge II/ 24 so as to be immediately returned in a downward direction to its initial rest position, while the intermediate jack 11 continues to move along the cam path II/ 19 to move the butt of the coupling slider 12, in the manner indicated in FIG. 2b, subsequent to the collecting station II/S again in the upper coupling cam path II/22 above loop sinking feed cam 40.
  • the intermediate jacks 11 in the cam paths 19 are returned to the lower paths 18 and, when in these lower paths, move away from the coupling sliders 12 which by way of the cam paths 11/22 remain in their upwardly shifted positions to achieve a rapid transfer and return of the needles. Only in the region of the loop-sinking cam 23, Where the transferred needle is retracted in the aligned loop-sinker 29 for forming a loop, are the sliders 12 retracted again somewhat into the lower cylinder U to avoid damaging the components.
  • the intermediate jacks 11 are not raised and remain at their lower elevations with the butts 1110 moving along the cam paths 11/18.
  • the sliders 12 arriving by way of the coupling path I/22 are elevated immediately again into the coupling path I/22 by way of the intermediate jacks 11 guided along the path I/ 19, so that the needles remain in the upper cylinder and at the loop-sinking position I/29 form loops
  • the sliders 12 arriving at the collecting station 11/ S are not influenced by the intermediate jacks 11, so that the coupling sliders 12 remain in the lower cam paths 11/21 and thus retract the needles 13 into the lower cylinder where they are fed downwardly by the loop sinking feed cam 40 to the loop-sinking 11/23 where they form loops.
  • FIG. 4a shows how the needle 13 is moved by way of the downwardly moving coupling slider 14 in the upper cylinder with the lower end of the needle 13 displaced longitudinally against the corresponding lower coupling slider 12, whereupon the tip of the coupling slider 12 in a known way opens the lower latch of the needle.
  • FIG. 4b shows how the needle 13 is moved by way of the downwardly moving coupling slider 14 in the upper cylinder with the lower end of the needle 13 displaced longitudinally against the corresponding lower coupling slider 12, whereupon the tip of the coupling slider 12 in a known way opens the lower latch of the needle.
  • FIGS. 5-7 A further contribution to the increase in the knitting output of a machine constructed in accordance with the invention and to the more reliable operation thereof is provided by way of the retaining means 25 and 27 for the coupling sliders 12 and 14, these retaining means being, in accordance with the invention, supported for yieldable movement as has already been indicated in FIGS. 2 and 4.
  • the details of the structure of the retaining means are illustrated in FIGS. 5-7.
  • the pair of aligned retaining means 25 and 27, which are situated one opposite the other and both which form parts of one of the knitting systems, are illustrated with the depression 250 and 270 at those locations where the coupling and uncoupling between the sliders '14 and 12 and the needles 13 takes place.
  • a retaining means 25 or 27 in the form of an elongated circumferentially extending strip having a rib projection received in a groove in the upper portion of the wall 33 of the cam assembly of the lower cylinder or in a corresponding lower groove formed in the wall 32 of the cam assembly of the upper cylinder.
  • central stop members 251 and 271 of the retaining means 25 and 27, respectively are fixed to the retaining means 25 and 27 and extend behind the cam plates 320 and 330 respectively, preventing large radial movements toward and away from the cylinder axis.
  • These central stop pins 251 or 271 in addition permit a relatively small degree of swinging movement of the retaining means.
  • Each retaining means 25, 27 thus carries an axially extending stop member 251, 271 engaging a cam surface on cams 320 and 330, respectively at a side of said stop member which is directed away from said grooves in the cam assemblies receiving the projections of the respective retaining means.
  • Springs are situated in said grooves for urging the stop member against said cam surface at the side of the stop member.
  • the retaining means 25 and 27 have, as viewed in the circumferential direction, beside the depressions 250 and 270 the guide surfaces 252 and 272.
  • the coupling sliders 12 and 14 have, respectively, above and below their butts and 140, elongated notches 121 and 141. These notches 121 and 141 permit a swinging movement of the coupling sliders 12 and 14 in spite of the raised guide surfaces 272 and 252 of the retaining means 27 or 25 situated almost in the immediate vicinity of the exterior surface plane of the retaining means at the location of the depressions 250 and 270.
  • the length of the notches 121 and 141 is at least as great as the width of the guide surfaces.
  • the coupling sliders 12 in the lower cylinder U can, however, only swing into the depressions 270 when they are guided along the upper coupling cam path 22.
  • a swinging of the slider 12 is prevented by the guide surface 272.
  • FIGS. 8a-8c which correspond respectively to FIGS. 6a6c for the lower cylinder with the sliders 12 guided along the path 21.
  • the coupling operations between the sliders 12 and 14 and the needles 13 are facilitated since the coupling sliders are elastically supported.
  • a bending or a breaking of cam components, cylinder ribs, and coupling sliders is avoided if it should happen at any time that a tip of a coupling slider 12 or 14 does not succeed in opening the latch of the cooperating needle 13.
  • the retainers are situated directly at the cam plates 320 and 330 so that a relatively wide intermediate space between the walls 32 and 33 is achieved at the regions where a striping apparatus may be located if desired.
  • upper and lower cylinders each including a cylindrical cam assembly and a cylindrical needle assembly one of which rotates with respect to the other for acting on the needles in a given circumferential direction
  • said upper and lower cylinders respectively having coupling sliders for releasably coupling needles aligned therewith, respectively, selectively to said sliders for shifting a selected needle between said upper and lower cylinders
  • said lower cylinder including in addition to the coupling sliders thereof, pattern jacks and intermediate jacks situated respec tively between said pattern jacks and said coupling sliders of said lower cylinder, said upper and lower cylinders each being divided into a plurality of circumferentially distributed independent knitting systems, with the knitting systems of said upper cylinder respectively being aligned with the knitting systems of said lower cylinder, each of said knitting systems of said lower cylinder having a collecting station where there are collected all of
  • each cam assembly having a wall formed with a groove receiving a projection of said retaining means to form with the latter said support means, said projection and groove preventing axial displacement of each retaining means while permitting radial displacement thereof, and each retaining means carrying an axial extending stop member engaging a cam surface at a side of said stop member which is directed away from said groove while springs are situated in said groove for urging said stop member against said cam surface, to achieve a limited radial displacement of said retaining means while providing said resilient yieldable support means therefor.
  • each retaining means has in addition to said depression a guide surface situated at the exterior surface of said retaining means 'while each coupling slider has directed towards said retaining means an elongated notch of a length at least equal to the width of each guiding surface with the cams at each knitting system providing for the coupling sliders of the lower cylinder a coupling path which positions said coupling sliders of said lower cylinder for swinging into said depression of said retaining means only when said coupling sliders of said lower cylinder are guided along said coupling path.

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  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US747232A 1967-08-02 1968-07-24 Multiple-system double-cylinder circular knitting machine for knitting links-and-links patterns Expired - Lifetime US3564869A (en)

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DE (1) DE1635861C3 (de)
ES (1) ES355961A1 (de)
GB (1) GB1212573A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4233823A (en) * 1977-04-21 1980-11-18 Costruzioni Meccaniche Lonati S.P.A. Double-cylinder circular knitting machine
US5187951A (en) * 1990-07-10 1993-02-23 Bentley Group Limited Circular knitting machines
CN118814346A (zh) * 2024-09-20 2024-10-22 浙江伟焕机械制造股份有限公司 双针筒袜机及编织袜口的方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS169263B1 (de) * 1974-03-07 1976-07-29
US4122690A (en) * 1976-07-30 1978-10-31 Speizman Industries, Inc. Method and means for transferring knit loops between cylinders of a double cylinder knitting machine
IT1064557B (it) * 1976-12-01 1985-02-18 Lonati Cost Mecc Procedimento e macchina circolare per maglieria a doppio cilindro per la fabbricazione di tessuti a maglia con disegno,particolarmente di calze con distaccatura automatica di una calza dall'altra
IT1186223B (it) * 1985-12-02 1987-11-18 Lonati Spa Macchina circolare per maglieria a doppio cilindro con disositivo di azionamento delle platine di trasferimento perfezionato

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4233823A (en) * 1977-04-21 1980-11-18 Costruzioni Meccaniche Lonati S.P.A. Double-cylinder circular knitting machine
US5187951A (en) * 1990-07-10 1993-02-23 Bentley Group Limited Circular knitting machines
CN118814346A (zh) * 2024-09-20 2024-10-22 浙江伟焕机械制造股份有限公司 双针筒袜机及编织袜口的方法

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DE1635861B2 (de) 1973-05-24
DE1635861A1 (de) 1972-12-28
GB1212573A (en) 1970-11-18
DE1635861C3 (de) 1973-12-13
ES355961A1 (es) 1970-03-16

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